Organ Solo Organ SKU: HL.124615 Arranged by Diane Bish. Organ. Fred Bock Publications. General Worship, Hymn, Sacred, Variations. 16 pages. Fred Bock Music Company #BGK1037. Published by Fred Bock Music Company (HL.124615). ISBN 9781495078507. UPC: 884088968182. 9.0x12.0x0.069 inches.Diane Bish's new setting of the much-loved Welsh hymn tune Hyfrydol is a welcome addition to the organist's library. The four flexible variations - which include a Schumannesque first variation, an incisive Baroque-like variation, a lyrical sarabande, and a toccata finale - could be played in whole or in part as a concert suite, or used for hymn introductions and interludes.